Penyelesaian dari persamaan :• (2x-1)(x+8)=x(2x+7)Jawab :
" Persamaan Kuadrat "
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( 2x – 1 ) ( x + 8 ) = x( 2x + 7 )
( 2x × x + 2x × 8 – 1 × x – 1 × 8 ) = x × 2x + x × 7
2x² + 16x – x – 8 = 2x² + 7x
2x² + 15x – 8 = 2x² + 7x
2x² – 2x² + 15x – 7x – 8 = 0
8x – 8 = 0
8x = 8
x = 8 ÷ 8
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~PERSAMAAN
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Penjelasan dengan langkah-langkah:
(2x – 1)(x + 8) = x(2x + 7)
2x² + 16x – x – 8 = 2x² + 7x
16x – x – 8 = 7x
15x – 8 = 7x
15x – 7x = 8
8x = 8
x = 8/8
x = 1